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#ifndef __LZARITHMETIC_ENCODER_H
#define __LZARITHMETIC_ENCODER_H
#include "Portable.h"
#include "AriPrice.h"
#include "LZMA.h"
#include "LenCoder.h"
#include "LiteralCoder.h"
#include "AriConst.h"
// NOTE Here is choosen the MatchFinder
#include "BinTree2.h"
#define MATCH_FINDER NBT2::CMatchFinderBinTree
namespace NCompress {
namespace NLZMA {
struct COptimal
{
CState State;
bool Prev1IsChar;
bool Prev2;
UINT32 PosPrev2;
UINT32 BackPrev2;
UINT32 Price;
UINT32 PosPrev; // posNext;
UINT32 BackPrev;
UINT32 Backs[kNumRepDistances];
void MakeAsChar() { BackPrev = UINT32(-1); Prev1IsChar = false; }
void MakeAsShortRep() { BackPrev = 0; ; Prev1IsChar = false; }
bool IsShortRep() { return (BackPrev == 0); }
};
extern BYTE g_FastPos[1024];
inline UINT32 GetPosSlot(UINT32 aPos)
{
if (aPos < (1 << 10))
return g_FastPos[aPos];
if (aPos < (1 << 19))
return g_FastPos[aPos >> 9] + 18;
return g_FastPos[aPos >> 18] + 36;
}
inline UINT32 GetPosSlot2(UINT32 aPos)
{
if (aPos < (1 << 16))
return g_FastPos[aPos >> 6] + 12;
if (aPos < (1 << 25))
return g_FastPos[aPos >> 15] + 30;
return g_FastPos[aPos >> 24] + 48;
}
const int kIfinityPrice = 0xFFFFFFF;
typedef CMyBitEncoder<kNumMoveBitsForMainChoice> CMyBitEncoder2;
const int kNumOpts = 1 << 12;
class CEncoder : public CBaseCoder
{
COptimal m_Optimum[kNumOpts];
public:
MATCH_FINDER m_MatchFinder;
CMyRangeEncoder m_RangeEncoder;
private:
CMyBitEncoder2 m_MainChoiceEncoders[kNumStates][NLength::kNumPosStatesEncodingMax];
CMyBitEncoder2 m_MatchChoiceEncoders[kNumStates];
CMyBitEncoder2 m_MatchRepChoiceEncoders[kNumStates];
CMyBitEncoder2 m_MatchRep1ChoiceEncoders[kNumStates];
CMyBitEncoder2 m_MatchRep2ChoiceEncoders[kNumStates];
CMyBitEncoder2 m_MatchRepShortChoiceEncoders[kNumStates][NLength::kNumPosStatesEncodingMax];
CBitTreeEncoder<kNumMoveBitsForPosSlotCoder, kNumPosSlotBits> m_PosSlotEncoder[kNumLenToPosStates];
CReverseBitTreeEncoder2<kNumMoveBitsForPosCoders> m_PosEncoders[kNumPosModels];
CReverseBitTreeEncoder2<kNumMoveBitsForAlignCoders> m_PosAlignEncoder;
// CBitTreeEncoder2<kNumMoveBitsForPosCoders> m_PosEncoders[kNumPosModels];
// CBitTreeEncoder2<kNumMoveBitsForAlignCoders> m_PosAlignEncoder;
NLength::CPriceTableEncoder m_LenEncoder;
NLength::CPriceTableEncoder m_RepMatchLenEncoder;
NLiteral::CEncoder m_LiteralEncoder;
UINT32 m_MatchDistances[kMatchMaxLen + 1];
bool m_FastMode;
bool m_MaxMode;
UINT32 m_NumFastBytes;
UINT32 m_LongestMatchLength;
UINT32 m_AdditionalOffset;
UINT32 m_OptimumEndIndex;
UINT32 m_OptimumCurrentIndex;
bool m_LongestMatchWasFound;
UINT32 m_PosSlotPrices[kNumLenToPosStates][kDistTableSizeMax];
UINT32 m_DistancesPrices[kNumLenToPosStates][kNumFullDistances];
UINT32 m_AlignPrices[kAlignTableSize];
UINT32 m_AlignPriceCount;
UINT32 m_DistTableSize;
UINT32 m_PosStateBits;
UINT32 m_PosStateMask;
UINT32 m_LiteralPosStateBits;
UINT32 m_LiteralContextBits;
UINT32 m_DictionarySize;
UINT32 m_DictionarySizePrev;
UINT32 m_NumFastBytesPrev;
UINT32 ReadMatchDistances()
{
UINT32 aLen = m_MatchFinder.GetLongestMatch(m_MatchDistances);
if (aLen == m_NumFastBytes)
aLen += m_MatchFinder.GetMatchLen(aLen, m_MatchDistances[aLen],
kMatchMaxLen - aLen);
m_AdditionalOffset++;
HRESULT aResult = m_MatchFinder.MovePos();
if (aResult != S_OK)
throw aResult;
return aLen;
}
void MovePos(UINT32 aNum);
UINT32 GetRepLen1Price(CState aState, UINT32 aPosState) const
{
return m_MatchRepChoiceEncoders[aState.m_Index].GetPrice(0) +
m_MatchRepShortChoiceEncoders[aState.m_Index][aPosState].GetPrice(0);
}
UINT32 GetRepPrice(UINT32 aRepIndex, UINT32 aLen, CState aState, UINT32 aPosState) const
{
UINT32 aPrice = m_RepMatchLenEncoder.GetPrice(aLen - kMatchMinLen, aPosState);
if(aRepIndex == 0)
{
aPrice += m_MatchRepChoiceEncoders[aState.m_Index].GetPrice(0);
aPrice += m_MatchRepShortChoiceEncoders[aState.m_Index][aPosState].GetPrice(1);
}
else
{
aPrice += m_MatchRepChoiceEncoders[aState.m_Index].GetPrice(1);
if (aRepIndex == 1)
aPrice += m_MatchRep1ChoiceEncoders[aState.m_Index].GetPrice(0);
else
{
aPrice += m_MatchRep1ChoiceEncoders[aState.m_Index].GetPrice(1);
aPrice += m_MatchRep2ChoiceEncoders[aState.m_Index].GetPrice(aRepIndex - 2);
}
}
return aPrice;
}
/*
UINT32 GetPosLen2Price(UINT32 aPos, UINT32 aPosState) const
{
if (aPos >= kNumFullDistances)
return kIfinityPrice;
return m_DistancesPrices[0][aPos] + m_LenEncoder.GetPrice(0, aPosState);
}
UINT32 GetPosLen3Price(UINT32 aPos, UINT32 aLen, UINT32 aPosState) const
{
UINT32 aPrice;
UINT32 aLenToPosState = GetLenToPosState(aLen);
if (aPos < kNumFullDistances)
aPrice = m_DistancesPrices[aLenToPosState][aPos];
else
aPrice = m_PosSlotPrices[aLenToPosState][GetPosSlot2(aPos)] +
m_AlignPrices[aPos & kAlignMask];
return aPrice + m_LenEncoder.GetPrice(aLen - kMatchMinLen, aPosState);
}
*/
UINT32 GetPosLenPrice(UINT32 aPos, UINT32 aLen, UINT32 aPosState) const
{
if (aLen == 2 && aPos >= 0x80)
return kIfinityPrice;
UINT32 aPrice;
UINT32 aLenToPosState = GetLenToPosState(aLen);
if (aPos < kNumFullDistances)
aPrice = m_DistancesPrices[aLenToPosState][aPos];
else
aPrice = m_PosSlotPrices[aLenToPosState][GetPosSlot2(aPos)] +
m_AlignPrices[aPos & kAlignMask];
return aPrice + m_LenEncoder.GetPrice(aLen - kMatchMinLen, aPosState);
}
UINT32 Backward(UINT32 &aBackRes, UINT32 aCur);
UINT32 GetOptimum(UINT32 &aBackRes, UINT32 aPosition);
UINT32 GetOptimumFast(UINT32 &aBackRes, UINT32 aPosition);
void FillPosSlotPrices();
void FillDistancesPrices();
void FillAlignPrices();
HRESULT Flush();
HRESULT Create();
HRESULT CodeReal(ISequentialInStream *anInStream, ISequentialOutStream *anOutStream, const UINT64 *anInSize);
HRESULT Init(ISequentialInStream *anInStream, ISequentialOutStream *anOutStream);
public:
CEncoder();
HRESULT SetEncoderAlgorithm(UINT32 A);
HRESULT SetEncoderNumFastBytes(UINT32 A);
HRESULT SetDictionarySize(UINT32 aDictionarySize);
HRESULT SetLiteralProperties(UINT32 aLiteralPosStateBits, UINT32 aLiteralContextBits);
HRESULT SetPosBitsProperties(UINT32 aNumPosStateBits);
HRESULT Code(ISequentialInStream *anInStream, ISequentialOutStream *anOutStream, const UINT64 *anInSize);
HRESULT WriteCoderProperties(ISequentialOutStream *anOutStream);
};
}}
#endif
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